COMPOSITE ANTENNA FOR CELLULAR AND GPS COMMUNICATIONS

摘要

A composite antenna comprising a first antenna (12) and a second antenna (14) suitable for transceiving independent signals in the cellular communication and GPS bands. The first antenna has upper and lower electrically conductive discs (16, 18) of substantially the same size aligned substantially in parallel, a first means (30) for application of a first electrical signal between and at substantially geometric centers of the discs, and a plurality of electrically conductive shunts. The second (GPS) antenna is attached atop the upper electrically conductive disc and has a second means (32) for application of a second electrical signal to the GPS antenna. The shunts are electrically connected to the first electrically conductive disc and the second electrically conductive discs, whereby the first and second electrically conductive discs are spaced from each other by a volume of free space or a volume occupied by a dielectric material.